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Investigating the ecological fallacy through sampling distributions constructed from finite populations

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  • Torres David J.

    (Department of Mathematics and Physical Science, Northern New Mexico College, Española, NM 87532, USA)

  • Rouson Damain

    (Computer Languages and Systems Software Group, Lawrence Berkeley National Laboratory, Berkeley, California, USA)

Abstract

Correlation coefficients and linear regression values computed from group averages can differ from correlation coefficients and linear regression values computed using individual scores. This observation known as the ecological fallacy often assumes that all the individual scores are available from a population. In many situations, one must use a sample from the larger population. In such cases, the computed correlation coefficient and linear regression values will depend on the sample that is chosen and the underlying sampling distribution. The sampling distribution of correlation coefficients and linear regression values for group averages will be identical to the sampling distribution for individuals for normally distributed variables for random samples drawn from infinitely large continuous distributions. However, data that is acquired in practice is often acquired when sampling without replacement from a finite population. Our objective is to demonstrate through Monte Carlo simulations that the sampling distributions for correlation and linear regression will also be similar for individuals and group averages when sampling without replacement from normally distributed variables. These simulations suggest that when a random sample from a population is selected, the correlation coefficients and linear regression values computed from individual scores will not be more accurate in estimating the entire population values compared to samples when group averages are used as long as the sample size is the same.

Suggested Citation

  • Torres David J. & Rouson Damain, 2024. "Investigating the ecological fallacy through sampling distributions constructed from finite populations," Monte Carlo Methods and Applications, De Gruyter, vol. 30(4), pages 331-363.
    • Handle: RePEc:bpj:mcmeap:v:30:y:2024:i:4:p:331-363:n:1001
    DOI: 10.1515/mcma-2024-2013
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    References listed on IDEAS

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    1. N. Cleave & P. J. Brown & C. D. Payne, 1995. "Evaluation of Methods for Ecological Inference," Journal of the Royal Statistical Society Series A, Royal Statistical Society, vol. 158(1), pages 55-72, January.
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